<span> Patented Compression Sliding Sealing System </span> Featuring patented dual-row roller side-compression hardware, the sash is pressed outward by 5mm after a 180° handle rotation. <span> Dual Thermal Break Frame for Enhanced Insulation </span> Double thermal break frame design combined with PA66 nylon thermal strips and automotive-grade EPDM gaskets effectively blocks heat transfer <span> Innovative Balcony-Oriented Functional Design </span> Integrated external glass safety railing and optional invisible folding insect screen maximize balcony usability while ensuring durability, easy cleaning, and a clean, modern appearance. <span> Heavy-Duty Sliding Performance with Flexible Configuration </span> Double-track bottom sliding structure provides smooth movement and high load capacity, paired with insulated glazing (standard 5+22A+5, optional 8+16A+8) and full HÖRMANN hardware for reliable, long-term performance and customizable opening combinations.

PARAMETER

CHARACTERISTIC

• Fully Concealed Window Sash Design.When closed, the sash is completely embedded within the frame, with no visible edges on the top, bottom, or sides—only a single line remains in the center. This achieves a 98% visual clarity rate, creating a "window as if absent" effect that delivers a vertically expansive, unobstructed view, bringing the outdoor scenery fully into sight.
• Slim Mid-Rail Design.The sash sightline is only 30mm, paired with a frame sightline of 55mm, blending seamlessly with the minimalist aesthetic of modern luxury design. The clean and elegant appearance enhances spatial beauty.
• Versatile Window Styles.Options such as two-sash sliding and four-slab sliding configurations are available to meet installation needs in different spaces. The fixed bottom design adds flexibility in usage.
• Unique Six-Track Bottom Rail.Utilizing high-precision 304 stainless steel rails, the design ensures hardness, smooth and silent sliding, easy cleaning, and resistance to water accumulation. Its drainage capacity is 10 times that of ordinary designs, effectively preventing rainwater backflow. The rail edge guard further enhances waterproof performance and aesthetic appeal.
• Multi-Seal Hook Rail with Automotive-Grade Seals and Thermal Break Structure.Featuring multiple sealing points combined with automotive-grade sealing strips and thermal break construction, the design triples the sealing performance. It provides excellent wind and water resistance, forming a tight seal that effectively blocks cold air infiltration, improves thermal insulation, and creates a comfortable indoor environment. 
• 45-Degree Sash Design with Internal Dual Corner Brackets.The 45-degree angled sash, reinforced with internal dual corner brackets, enhances structural stability, wind pressure resistance, and waterproof performance, while also elevating the overall aesthetic of the window.
• Certified Lock System.Tested to meet standards, the lock offers high resistance to tampering. It remains fully functional after 15,000 open-close cycles, with an operating force of ≤ 20N, ensuring safety and reliability.
• High-Quality Materials and Construction.Crafted from 6063A-T5 primary ecological aluminum, the main material has a wall thickness of 1.8mm. The frame employs 90-degree mitered joints, while the sash uses 45-degree mitered joints, ensuring a solid and durable structure. Standard components include ASSA locks and flexible steel mesh screens, guaranteeing quality.
• Wide Color Selection and Superior Finish.A variety of color options allows flexible coordination with different  home decor styles. The surface treatment is excellent, with no visible defects on exposed surfaces, uniform coating color, and strong corrosion resistance.